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City of Santa Ana California Environmental Quality Act <br />Mitigation Monitoring and Reporting Plan <br /> <br />- 11 - <br />Santa Ana Zoo Stormwater Capture and Diversion MND <br />Mitigation Monitoring and Reporting <br />Mitigation Measure Implementation <br />Party <br />Implementation <br />Phase <br />Monitored <br />By <br />Outside <br />Agency <br />Coordination <br />▪ Break line of sight from noise source to <br />receiver <br />▪ Use a frame to secure an appropriate <br />acoustic blanket or paneling <br />▪ Use a solid material with a minimum <br />surface density of 3 lb/ft2 or mass-loaded <br />acoustic blankets with at least STC 25 <br />▪ Overlap or seal any gaps in the barriers <br />➢ Designate haul routes to be used based on the <br />least overall noise impact route, with heavily- <br />loaded trucks away from residential streets, if <br />possible. Identify haul routes streets with the <br />fewest noise sensitive receivers if no <br />alternatives are available. <br />➢ Place earth-moving equipment, fixed noise- <br />generating equipment, stockpiles, staging <br />areas, and other noise-producing operations as <br />far as practicable from noise-sensitive <br />receivers. <br />➢ Eliminate the use of horns, whistles, alarms, <br />and bells. <br />➢ Phase demolition, earth moving, and ground <br />impacting operations so they do not occur in <br />the same time period. <br />  <br />  <br />City Council 15 – 119 12/2/2025